Ecosystems Stem Case

Not living, or produced by living things

• Abiotic factors

• Biotic factors

• Ecosystem

• Population

Tags

NGSS.MS-LS2-3

Living, or produced by living things

• Biotic factor

• Abiotic factor

• Organisms

• Competition

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Hawks and owls eat the same type of food and struggle with one another to get their food. What is this an example of?

• Competition

• Biotic factor

• Symbiosis

• Population

Tags

NGSS.MS-LS2-2

The specific environment in which all the biotic and abiotic factors in an area interact.

• Ecosystem

• Organism

• Struggle

• Competitive Interaction

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Hawks and brown bears live together in the same habitat. There will be competition between the hawks and the brown bears only if which of the following is true?

• Brown bears hibernate during the winter while hawks remain active.

• Pesticides in the fish population affect hawks’ eggs and decrease their population.

• Both brown bears and hawks feed on the same species of fish.

• Both Shanna and Savanna feed on the same species of snakes.

Tags

NGSS.MS-LS2-1

Which of the following is likely to contribute to more competition between two members of the same species living in a certain habitat?

• Increased food resources

• Increased population of the species

• Increased annual snowfall

• Increased size of the habitat

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The population of deer in a certain area is monitored over a period of six years. The data is represented in the graph provided. Which of the following is the most likely explanation for the change in population in 2009?

• Wild dogs, which prey on deer, were being hunted more than usual.

• Snowfall in the previous spring was higher than the yearly average.

• Humans introduced grazing animals that feed on the same plants as the deer.

• More insects that pollinate flowering plants move into the ecosystem.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In an ecosystem, what do organisms and populations with similar needs compete over?

• food

• water

• shelter

• all of the above

Tags

NGSS.MS-LS2-1

The milkweed plant serves an important role in the life cycle of the monarch butterfly. Adult monarchs lay their eggs on milkweed, and then caterpillars eat that same plant during their development. Based on the relationship between monarchs and milkweed, which of the following trends would be predicted when looking at data on the populations of these two organisms?

• A decrease in the milkweed population will cause a decrease in the monarch butterfly population.

• When the milkweed population decreases, the monarch butterfly population stays the same.

• A decrease in the milkweed population will cause the monarch population to increase.

• When the monarch population increases, the milkweed population stays the same.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which of the following lists contains only abiotic factors?

• water, air, temperature

• grass, air, people

• trees, fish, polar bears

• grass, water, sand

Tags

NGSS.MS-LS2-3